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- Shin Hum Cho
- McKetta Department of Chemical Engineering, The University of Texas at Austin 1 , Austin, Texas 78712, USA
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- Kevin M. Roccapriore
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory 2 , Oak Ridge, Tennessee 37831, USA
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- Chandriker Kavir Dass
- Sensors Directorate, Air Force Research Laboratory, Wright-Patterson AFB 3 , Dayton, Ohio 45433, USA
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- Sandeep Ghosh
- McKetta Department of Chemical Engineering, The University of Texas at Austin 1 , Austin, Texas 78712, USA
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- Junho Choi
- Department of Physics, Center for Complex Quantum Systems, The University of Texas 5 , Austin, Texas 78712, USA
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- Jungchul Noh
- McKetta Department of Chemical Engineering, The University of Texas at Austin 1 , Austin, Texas 78712, USA
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- Lauren C. Reimnitz
- McKetta Department of Chemical Engineering, The University of Texas at Austin 1 , Austin, Texas 78712, USA
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- Sungyeon Heo
- McKetta Department of Chemical Engineering, The University of Texas at Austin 1 , Austin, Texas 78712, USA
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- Kihoon Kim
- McKetta Department of Chemical Engineering, The University of Texas at Austin 1 , Austin, Texas 78712, USA
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- Karen Xie
- McKetta Department of Chemical Engineering, The University of Texas at Austin 1 , Austin, Texas 78712, USA
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- Brian A. Korgel
- McKetta Department of Chemical Engineering, The University of Texas at Austin 1 , Austin, Texas 78712, USA
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- Xiaoqin Li
- Department of Physics, Center for Complex Quantum Systems, The University of Texas 5 , Austin, Texas 78712, USA
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- Joshua R. Hendrickson
- Sensors Directorate, Air Force Research Laboratory, Wright-Patterson AFB 3 , Dayton, Ohio 45433, USA
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- Jordan A. Hachtel
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory 2 , Oak Ridge, Tennessee 37831, USA
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- Delia J. Milliron
- McKetta Department of Chemical Engineering, The University of Texas at Austin 1 , Austin, Texas 78712, USA
説明
<jats:p>A synthetic challenge in faceted metal oxide nanocrystals (NCs) is realizing tunable localized surface plasmon resonance (LSPR) near-field response in the infrared (IR). Cube-shaped nanoparticles of noble metals exhibit LSPR spectral tunability limited to visible spectral range. Here, we describe the colloidal synthesis of fluorine, tin codoped indium oxide (F,Sn:In2O3) NC cubes with tunable IR range LSPR for around 10 nm particle sizes. Free carrier concentration is tuned through controlled Sn dopant incorporation, where Sn is an aliovalent n-type dopant in the In2O3 lattice. F shapes the NC morphology into cubes by functioning as a surfactant on the {100} crystallographic facets. Cube shaped F,Sn:In2O3 NCs exhibit narrow, shape-dependent multimodal LSPR due to corner, edge, and face centered modes. Monolayer NC arrays are fabricated through a liquid-air interface assembly, further demonstrating tunable LSPR response as NC film nanocavities that can heighten near-field enhancement (NFE). The tunable F,Sn:In2O3 NC near-field is coupled with PbS quantum dots, via the Purcell effect. The detuning frequency between the nanocavity and exciton is varied, resulting in IR near-field dependent enhanced exciton lifetime decay. LSPR near-field tunability is directly visualized through IR range scanning transmission electron microscopy-electron energy loss spectroscopy (STEM-EELS). STEM-EELS mapping of the spatially confined near-field in the F,Sn:In2O3 NC array interparticle gap demonstrates elevated NFE tunability in the arrays.</jats:p>
収録刊行物
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- The Journal of Chemical Physics
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The Journal of Chemical Physics 152 (1), 014709-, 2020-01-07
AIP Publishing